code: def avg_cpu_time(self):
      return self.cpu_time / self.call
  
file_path: VisualDL/visualdl/component/profiler/parser/operator_parser.py
imports: import collections
  from .kernel_parser import DeviceItem
  from .utils import wrap_tree
label_desc: Use image node_id 2 for calling the OperatorItem obj's underlying member method code with example usage: obj.avg_cpu_time() and returns: unknown